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High-conductivity graphene flexible compound membrane and preparation method therof

A graphene-flexible, high-conductivity technology, applied in the field of high-conductivity graphene flexible composite films and their preparation, to achieve the effects of improving lap efficiency, electrical conductivity, and high electrical conductivity

Active Publication Date: 2017-12-15
常州二维暖烯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the properties of highly conductive graphene flexible composite films, such as conductivity, film thickness, flexibility, toughness, etc., have yet to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0036] Prepare highly conductive graphene flexible composite film according to the following steps:

[0037] 1) Graphene powder is processed to improve conductivity: Graphene powder is prepared by a physical exfoliation method, with an average number of layers of 10 layers and a sheet diameter of 10um; the processing method steps of the graphene are as follows:

[0038] ①Put the graphene into the solvent N,N-dimethylformamide and shear it off;

[0039] ②Filter the solvent to obtain a filter cake with a solid content of about 50% or more;

[0040] ③The filter cake is quickly pushed into the high-temperature furnace protected by an inert atmosphere, and thermally expands at 800 degrees Celsius;

[0041] ④Put the powder obtained by thermal expansion into a graphitization furnace, and treat it at a high temperature of 2500 degrees Celsius to obtain the treated graphene powder, and measure the electrical conductivity of the graphene powder to be 10 6 -10 7 S / m.

[0042] 2) Comp...

preparation Embodiment 2

[0047] Prepare highly conductive graphene flexible composite film according to the following steps:

[0048] 1) Graphene powder is processed to improve conductivity: Graphene powder is prepared by oxidation-reduction method, with an average number of layers of 5 layers and a sheet diameter of 30um; the processing method steps of the graphene are as follows:

[0049] ①Put the graphene into the solvent N,N-dimethylformamide and shear it off;

[0050] ②Filter the solvent to obtain a filter cake with a solid content of about 50% or more;

[0051] ③The filter cake is quickly pushed into the high-temperature furnace protected by an inert atmosphere, and thermally expands at 900 degrees Celsius;

[0052] ④Put the powder obtained by thermal expansion into a graphitization furnace, and treat it at a high temperature of 2700 degrees Celsius to obtain the treated graphene powder, and measure the electrical conductivity of the graphene powder to be 10 6 -10 7 S / m.

[0053] 2) Composit...

preparation Embodiment 3

[0058] Prepare highly conductive graphene flexible composite film according to the following steps:

[0059] 1) Graphene powder is processed to improve conductivity: Graphene powder is prepared by physical exfoliation, with an average number of layers of 5 layers and a sheet diameter of 20um; the processing method steps of the graphene are as follows:

[0060] ①Put the graphene into the solvent N,N-dimethylformamide and shear it off;

[0061] ②Filter the solvent to obtain a filter cake with a solid content of about 50% or more;

[0062] ③The filter cake is quickly pushed into the high-temperature furnace protected by an inert atmosphere, and thermally expands at 800 degrees Celsius;

[0063] ④Put the powder obtained by thermal expansion into a graphitization furnace, and treat it at a high temperature of 2700 degrees Celsius to obtain the treated graphene powder, and measure the electrical conductivity of the graphene powder to be 10 6 -10 7 S / m.

[0064] 2) Composite: Mix...

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Abstract

The invention discloses a method for preparing a high-conductivity graphene flexible compound membrane. The method for preparing the high-conductivity graphene flexible compound membrane disclosed by the invention comprises the following steps: 1) treating graphene powder for increasing the conductivity: performing solvent peeling, thermal expansion and high-temperature thermal treatment on the graphene powder, thereby increasing the conductivity; 2) compounding: mixing the graphene powder acquired in the step 1), elastic macromolecular grain and solvent, thereby acquiring a mixture, and then adding thixotropic agent and viscosity modifier for controlling the dynamic viscosity to 6000-8000mpa; 3) forming a membrane: preparing the mixture into the membrane. The invention also discloses the high-conductivity graphene flexible compound membrane prepared according to the method disclosed by the invention.

Description

technical field [0001] The invention belongs to the technical field of graphene conductive films, in particular to a highly conductive graphene flexible composite film and a preparation method thereof. Background technique [0002] At present, as a conductive material, graphene products generally have a series of problems such as poor consistency, poor conductivity, and complicated dispersion and compounding process in the polymer material matrix. Therefore, graphene conductive composite materials with ultra-high conductivity are needed. [0003] Through the continuous preparation of graphene, the optimization of the number of layers, and the dispersion and compounding of graphene, a high-conductivity graphene composite film can be prepared. Compared with the currently known conductive composite materials, the graphene high-conductivity composite film is lighter and thinner, and the electrical resistivity is smaller: its electrical conductivity is 100 times that of ordinary ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L77/00C08L1/28C08L27/06C08L91/00C08L91/06C08K9/00C08K9/04C08K3/04
CPCC08K2201/001C08K2201/003C08L27/06C08L75/04C08L101/00C08L2203/16C08L2203/20C08L2205/03C08L2207/04C08L77/00C08L1/286C08K9/00C08K9/04C08K3/04C08L91/00C08L91/06
Inventor 周振义宋琪曾祥英
Owner 常州二维暖烯科技有限公司
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